... ,electroform,metal color, metal plating,electrophoresis, polishing,Aluminum color Multi-functional High speed electronic engraving machine is one of used specific ... practicality new type 012101210661.5, patent of outside design 01 3 10638.4, patent of invention 01105380.1 etc, via ... report from National product quality & control bureau: NPQC No.3. 200150013, as well as via of testing report from the ...